The role of inhibitory and excitatory neurometabolites in age-related differences in action selection.

IF 6 Q2 GERIATRICS & GERONTOLOGY npj aging Pub Date : 2025-03-13 DOI:10.1038/s41514-025-00204-5

Geraldine Rodríguez-Nieto, Amirhossein Rasooli, Hong Li, Stefan Sunaert, Dante Mantini, Mark Mikkelsen, Richard A E Edden, Sima Chalavi, Stephan P Swinnen

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Abstract

Aging is accompanied by changes in the level of neurometabolites. However, their role in vital behavioral functions is still unclear. We aimed to explore the impact of aging on the neurochemical mechanisms underlying action selection. Young (YA) (n = 25) and older adults (OA) (n = 26) performed a simple (SRT) and a choice (CRT) reaction time tasks. Magnetic resonance spectroscopy was utilized to track task-induced modulations in GABA and glutamate in the sensorimotor cortex (SM1) and dorsolateral prefrontal cortex (dlPFC). Results showed that (i) SM1 Glx levels were higher during the SRT in the full sample, (ii) Glx modulation in the dlPFC predicted better behavioral performance in the SRT only in YA, and iii) a task-induced increase in GABA and Glx in the dlPFC was related to action selection learning in the full sample. Our findings highlight an important role of neurometabolic modulation during action selection and learning.

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抑制性和兴奋性神经代谢物在行动选择的年龄相关差异中的作用。

衰老伴随着神经代谢物水平的变化。然而，它们在重要行为功能中的作用仍不清楚。我们旨在探讨衰老对行为选择背后的神经化学机制的影响。年轻人（YA）（n = 25）和老年人（OA）（n = 26）执行简单（SRT）和选择（CRT）反应时间任务。利用磁共振波谱技术追踪感觉运动皮层（SM1）和背外侧前额叶皮层（dlPFC）中GABA和谷氨酸的任务诱导调节。结果表明：(1)SM1 Glx水平在整个样本中在SRT期间较高；(2)Glx在dlPFC中的调节仅在YA中预测SRT中更好的行为表现；(3)任务诱导的dlPFC中GABA和Glx的增加与整个样本的动作选择学习有关。我们的研究结果强调了神经代谢调节在行动选择和学习中的重要作用。

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npj aging

CiteScore

8.90

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0.00%

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